Matthias was chosen as an apostle
to take the place of Judas of Kerioth after his betrayal. It is believed
that Matthias was one of the "Seventy" disciples sent out by Jesus (Luke 10:1),
however, this cannot be proven.

He, along with the apostles Jude (Thaddaeus),
Bartholomew, Simon the Zealot and Andrew are credited by Armenian tradition as
the apostles who evangelized
Armenia (great peril befell him in the cities of
Colchis, Sebastopol and elsewhere.)